[Tagging] waterway=penstock to complete pipeline tagging

[Warin]

On 6/10/2015 8:57 PM, Martin Koppenhoefer wrote:
>
> 2015-10-06 10:42 GMT+02:00 Christoph Hormann <chris_hormann at gmx.de 
> <mailto:chris_hormann at gmx.de>>:
>
>     >
>     > can you give an example for a pipeline without a pipe?
>
>     Apart from the pressure tubes of hydropower plants the most common
>     case
>     is probably sewer pipes.  For general transport pipelines cutting them
>     into rock is rare due to the high costs.  Hydropower penstocks are an
>     exception mostly due to the high volume high pressure combination and
>     sewage due to the space constraints in urban environments.
>
>
>
>
> but are these called "pipelines"? Aren't those "pressure tunnels" / 
> "hydraulic galleries"? The only pipeless pipelines I could find in a 
> quick search are referring to a python library ;-)
>
> I'm not sure (not rethoric, I'm really not sure, maybe we should 
> indeed?) whether we want to use man_made=pipeline for all kind of 
> linear way for liquids and gas, regardless of size, length, 
> construction, purpose. The wiki says the tag is only for "major" 
> pipelines (typical wiki speech, not usable to make a decision, I'd 
> rather remove this word to avoid splitting hair). Would the water 
> tubes and sewage tubes in my house be regarded a "pipeline"? The one 
> in the road in front of my house? What would be a sensible limit? 
> Might depend on the substance as well, e.g. a beer pipeline might have 
> only 20mm and would already be significant.
>
>

I'd like to think anything carrying waste water (sewer) would have a non 
permeable lining.. and that lining could be called a 'pipe' and thus it 
is a 'pipeline'.

To me the 'tubes' in my house for carrying water/gas are pipes .. and as 
they are a line then they are pipelines!
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